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WO2024252323A1 - Système d'affichage par projection novateur à géométrie réglable - Google Patents

Système d'affichage par projection novateur à géométrie réglable Download PDF

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Publication number
WO2024252323A1
WO2024252323A1 PCT/IB2024/055542 IB2024055542W WO2024252323A1 WO 2024252323 A1 WO2024252323 A1 WO 2024252323A1 IB 2024055542 W IB2024055542 W IB 2024055542W WO 2024252323 A1 WO2024252323 A1 WO 2024252323A1
Authority
WO
WIPO (PCT)
Prior art keywords
display system
projection
based display
dark
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IB2024/055542
Other languages
English (en)
Inventor
Giovanni Barile
Lapo LOLLI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leonardo SpA
Original Assignee
Leonardo SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leonardo SpA filed Critical Leonardo SpA
Publication of WO2024252323A1 publication Critical patent/WO2024252323A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D43/00—Arrangements or adaptations of instruments
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Definitions

  • the present invention relates, in general, to an innovative display system with adjustable geometry and, in particular, to a geometrically resizable waveguide integrated/embedded in a pro ection-based display system.
  • LCDs Liquid Crystal Displays
  • LCD market has no geometrical flexibility since it offers only predefined shapes and aspect ratios.
  • a mismatch arises between the allocated space geometry for displays and available mechanical characteristics of commercial LCDs.
  • customized displays must be developed ad hoc in order to fit the defined space constraints leading to high costs with relative loss in competitivity .
  • the required numbers for a customized unit may far exceed the needs (e.g., in avionic market, etc . ) .
  • US 2006/132914 Al discloses an incident image displaying device for displaying at least one incident image against a scene image of a scene, the incident image displaying device including at least one light guide, at least one input beam trans forming element , at least one output beam trans forming element and a scene image reflector, each of the input beam trans forming element and the output beam trans forming element being incorporated with a respective light guide , the scene image reflector being located behind the light guide , the input beam trans forming element receiving incident light beams respective of the incident image from a respective one of at least one image source , the output beam trans forming element being associated with a respective input beam trans forming element , the scene image reflector reflecting the scene image through at least a portion of the output beam trans forming element , wherein the input beam trans forming element couples the incident light beams into the respective light guide as a set of coupled light beams , the set of coupled light beams is associated with the respective input beam trans forming element , wherein the output beam trans forming element receives from
  • US 2016/ 377862 Al discloses a system to be used with an aircraft or other vehicle and including a waveguide disposed above and below a top surface of a glare shield .
  • the waveguide can be part of a head up display (HUD) and can be disposed to cover at least part of the head down di splay to provide an integrated display .
  • HUD head up display
  • US 2016/ 170212 Al discloses an optical device that includes a light waves-transmitting substrate having two maj or surfaces and edges , optical means for coupling light into the substrate by total internal reflection, and a plurality of partially reflecting surfaces carried by the substrate .
  • the partially reflecting surfaces are parallel to each other and are not parallel to any of the edges of the substrate , one or more of the partially reflecting surfaces being an anisotropic surface .
  • the optical device has dual operational modes in see-through configuration . In a first mode , light waves are proj ected from a display source through the substrate to an eye of a viewer . In a second mode , the display source is shut of f and only an external scene is viewable through the substrate .
  • US 2006/215244 Al discloses a system for displaying an incident image for an operator of a vehicle , the system including an optical assembly receiving the incident image from an image source , and a planar optical module optically coupled with the optical assembly, the optical assembly producing a collimated light beam according to the incident image , the planar optical module being located in a line of sight of the operator, the planar optical module displaying a set of output decoupled images , each of the output decoupled images being similar to the incident image , and each of the output decoupled images having a focal point substantially located at an infinite distance from the operator .
  • the Applicant has felt the need to solve the problem of potential mismatch between the cockpit space allocated for displays and the LCDs available on the market , thereby achieving the present invention .
  • an obj ect of the present invention is that of providing a solution to potential mismatch between the cockpit space allocated for displays and the LCDs available on the market .
  • a proj ection-based display system includes : • a light source that is a light engine based on a RGB microled array,
  • a di f fractive waveguide that comprises a dark, reflective rear face and a transparent front face .
  • the light source is configured to inj ect one or more light beams/ signals carrying one or more given images into the di f fractive waveguide via the coupling optics , whereby
  • the present invention concerns a projection-based display system that includes a light source, a coupling optics and a diffractive waveguide, wherein the light source is a light engine based on RGB microscopic Light Emitting Diode (microled) array; the diffractive waveguide comprises transparent material having a transparent front face and a dark, reflective rear surface (i.e., an absorbing surface but still with the capability to reflect a percentage of wavelengths - in particular, including visible wavelengths) .
  • the light source is a light engine based on RGB microscopic Light Emitting Diode (microled) array
  • the diffractive waveguide comprises transparent material having a transparent front face and a dark, reflective rear surface (i.e., an absorbing surface but still with the capability to reflect a percentage of wavelengths - in particular, including visible wavelengths) .
  • Said light source injects images to be displayed into the diffractive waveguide by means of the coupling optics, wherein the images are projected on the front face of the diffractive waveguide that is designed to present a distortion-free image by maintaining phase and intensity relations of the input signal.
  • FIGS 1 and 2 schematically illustrate a projectionbased display system 1 according to an embodiment of the present invention, wherein said projection-based display system 1 includes a light engine 2 (preferably a microled array, conveniently a RGB microled array) , a coupling optics 3 (preferably including one or more lenses) and a diffractive waveguide 4 that includes a dark, reflective rear face (or wall) and a transparent front face (or wall) 4a.
  • the light engine 2 injects one or more light beams/signals carrying one or more given images into the diffractive waveguide 4 via the coupling optics 3, in particular via a side wall of said diffractive waveguide 4.
  • the injected light beam ( s ) /signal ( s ) impinge on the dark, reflective rear face, whereby said light beam ( s ) /signal ( s ) is/are reflected by said dark, reflective rear face so as to reach the transparent front face 4a where the given image (s) is/are displayed .
  • the light engine 2 receives from a processing device/system 5 (e.g., a Personal Computer - PC) digital data (preferably, a digital video signal) indicative of the given image (s) to be displayed and generates corresponding divergent light beam ( s ) /signal ( s ) based on said digital data.
  • a processing device/system 5 e.g., a Personal Computer - PC
  • digital data preferably, a digital video signal
  • the coupling optics 3 converges said divergent light beam ( s ) /signal ( s ) in paraxial rays parallel to a given optical axis, whereby the light beam beam ( s ) /signal ( s ) enter (s) the diffractive waveguide 4 via the side wall thereof .
  • the waveguides thanks to the variation of refractive index of their own transparent material, have the capability to guide input light waves through the transparent material without losing wave spatial coherence .
  • the geometrical variation of size and form factor of the diffractive waveguide 4 allows to have display with different sizes and form factors.
  • said projection-based display system 1 is equivalent to a transmissive LCD, wherein the light engine 2 is equivalent to a picture generator that is within common consumer projectors, the coupling optics 3 is an output optics of said common consumer projectors and the diffractive waveguide 4 corresponds to a white wall where pictures are pro j ected .
  • the present invention allows to make a projective flat panel display visually appearing as a transmissive LCD that can be tailored by simply resizing the diffractive waveguide 4 and changing the coupling optics 3 so as to fit the allocated space on a cockpit.
  • the projection-based display system 1 has a geometrical flexibility, namely: by resizing and shaping the diffractive waveguide 4 and consequently adapting the lenses of the optical coupler 3 , di f ferent shapes can be achieved, whereby with one and the same light engine 1 it is possible to have several di f ferently-shaped flat panel displays .
  • the present invention can be advantageously exploited on board aircraft , helicopters , terrestrial vehicles , naval units , trains or the like .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Instrument Panels (AREA)

Abstract

La présente invention concerne un système d'affichage par projection (1) qui comprend : une source de lumière (2) qui est un moteur de lumière basé sur un réseau de micro-DEL RVB, une optique de couplage (3) et un guide d'ondes de diffraction (4) qui comprend une face arrière sombre et réfléchissante et une face avant transparente (4a). La source de lumière (2) est conçue pour injecter un ou plusieurs faisceaux/signaux lumineux contenant une ou plusieurs images données dans le guide d'ondes de diffraction (4) par l'intermédiaire de l'optique de couplage (3), moyennant quoi les faisceaux/signaux lumineux injectés frappent la face arrière sombre et réfléchissante, la ou les images données sont focalisées sur ladite face arrière sombre et réfléchissante, et lesdits faisceaux/signaux lumineux injectés sont réfléchis par ladite face arrière sombre et réfléchissante, atteignant ainsi la face avant transparente (4a) où ladite ou lesdites images données sont affichées.
PCT/IB2024/055542 2023-06-06 2024-06-06 Système d'affichage par projection novateur à géométrie réglable Pending WO2024252323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000011475A IT202300011475A1 (it) 2023-06-06 2023-06-06 Innovativo sistema di visualizzazione basato su proiezione a geometria variabile
IT102023000011475 2023-06-06

Publications (1)

Publication Number Publication Date
WO2024252323A1 true WO2024252323A1 (fr) 2024-12-12

Family

ID=87514360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/055542 Pending WO2024252323A1 (fr) 2023-06-06 2024-06-06 Système d'affichage par projection novateur à géométrie réglable

Country Status (2)

Country Link
IT (1) IT202300011475A1 (fr)
WO (1) WO2024252323A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020008854A1 (en) * 2000-03-20 2002-01-24 Leigh Travis Adrian Robert Waveguide display
US20060132914A1 (en) 2003-06-10 2006-06-22 Victor Weiss Method and system for displaying an informative image against a background image
US20060215244A1 (en) 2003-12-02 2006-09-28 Jacob Yosha Vehicle display system
US20130010355A1 (en) * 2011-07-05 2013-01-10 Microsoft Corporation Optic with extruded conic profile
US20160170212A1 (en) 2005-02-10 2016-06-16 Lumus Ltd. Substrate-guide optical device
US20160377862A1 (en) 2015-06-29 2016-12-29 Rockwell Collins, Inc. System for and method of integrating head up displays and head down displays

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020008854A1 (en) * 2000-03-20 2002-01-24 Leigh Travis Adrian Robert Waveguide display
US20060132914A1 (en) 2003-06-10 2006-06-22 Victor Weiss Method and system for displaying an informative image against a background image
US20060215244A1 (en) 2003-12-02 2006-09-28 Jacob Yosha Vehicle display system
US20160170212A1 (en) 2005-02-10 2016-06-16 Lumus Ltd. Substrate-guide optical device
US20130010355A1 (en) * 2011-07-05 2013-01-10 Microsoft Corporation Optic with extruded conic profile
US20160377862A1 (en) 2015-06-29 2016-12-29 Rockwell Collins, Inc. System for and method of integrating head up displays and head down displays

Also Published As

Publication number Publication date
IT202300011475A1 (it) 2024-12-06

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